Green-Products Empty Set of Refillable Ink Jet Cartridges for HP 564 564 XL Photosmart: 5510, 5511, 5512, 5514, 5515, 5520, 5522, 5524, 5525, 6510, 6512, 6515, 6520, 6525, 7510 Save up to 95% of printing cost by refilling your cartridge. Can be refilled over 100 times. Save you time and money This set of 564 compatible refillable cartridges are shipped empty! Empty! You need to have ink ready to fill them before installing into your printer. Compatible with dye, pigment and sublimation inks. Bulk inks are much much cheaper. You can get 600ml bulk inks good for many many refills for around $20 One time ink level chips installed. The first time you install these cartridges the ink level will show up as full. then when the cartridge is depleted, the ink level will remain depleted but that will not affect printing. Just ignore the ink low warning and keep printing, then check the actual ink level by looking at the cartridge's transparent side panel, fill it if needed. Save money! Each refill only cost 30 cents or so. Save the earth! Reduce the landfill. The refillable cartridges are like the rechargeable batteries.